The purpose of the mucus found within the respiratory system is to

a- push the cilia away from the lungs
b- move air through the windpipe
c- trap particles from the air before they reach the lungs
d- lubricate the epiglottis

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?